ah... sorry... I have original bought the GOG version...
the previous advice for Steam was for the "non-original" version
So... who has Steam original, can try to rename the file "GameServicesSteam.dll" (for example to "GameServicesSteam_0.dll")
But it's without guarantee... Let know if it works...
------------------------------------------------------------------------
but it really works for me (GOG)... I don't have to switch anything and the game starts with my default language...
it may depend on the correct spelling of the abbreviation for a particular language.
For example, mine (Czech) is officially "cs-cz", but the game uses the notation "cz-cz"...
Here is the screen of the introductory text in Czech -> it is before the possibility to choose the language, so as evidence it is perhaps sufficient...
CtrlV.cz nabízí nejrychlejší ScreenShot a PrintScreen online jen pomocí webového prohlížeče a to bez doplňků.
ctrlv.cz